Fluid pump assembly and loading of same into a fluid delivery system

ABSTRACT

A fluid delivery system comprises: a control interface and multiple unique loading guides. The control interface of the fluid delivery system is configured to accept a fluid pump assembly. The multiple loading guides are retractable from the fluid delivery system to retain and control movement of a facing of the fluid pump assembly to contact the control interface on the facing of the fluid delivery system. In one configuration, the control interface is disposed in a cavity of the fluid delivery system; the multiple loading guides are disposed at locations in proximity to the cavity. The multiple loading guides can be configured to slidably retract in unison to support substantially orthogonal insertion of the fluid pump assembly into the cavity of the fluid delivery system.

RELATED APPLICATIONS

This application is a continuation of earlier filed U.S. patentapplication Ser. No. 14/608,556 entitled “FLUID PUMP ASSEMBLY ANDLOADING OF SAME INTO A FLUID DELIVERY SYSTEM,” (Attorney Docket No.FLU14-04), filed on Jan. 29, 2015, the entire teachings of which areincorporated herein by this reference.

BACKGROUND

In accordance with conventional fluid handling devices, particularlyinfusion pumps, it is often required for a respective caregiver tomanually insert a disposable infusion tube set into a fluid deliverysystem for delivery of fluid to a patient. In certain instances, whenoperating a pumping mechanism that utilizes a rotational or linearperistaltic pump mechanism, the user must “thread” the tubing into themechanical drive elements. It may be further required that one or moreultrasonic bubble detectors and/or pressure sensors align properlybefore the pump can be used.

Thus, in general, setting up a conventional fluid delivery system foruse is a time-consuming and error-prone process. Improper setup may alsoresult in certain important safety features being disabled. If the pumpis not set up correctly before use, the pump may malfunction, causingpossible injury or death.

Certain conventional fluid handling devices include a safety featuresuch as “anti-free flow” prevention mechanisms. In general, an anti-freeflow mechanism includes a physical clamp that clamps off a flow of fluidto a patient if the tube set is removed from the pump. Because they areprone to failure, these conventional mechanically actuated clamps havebeen common sources of recalls.

In accordance with both straight tube and cassette-based conventionaldesigns, it is common to utilize a door or some other mechanism to fullyenvelope the disposable cassette into a respective housing. This impedesthe caregiver from being able to view, inspect, and observe the systemfor proper operation. If something were to get caught in the door, suchas another tube or piece of clothing while the door is being lockedclosed, the user typically would not be able to easily see theobstruction. This can lead to an unsafe operating condition.

In certain instances, the process for loading a disposable cassette intoa pump has greatly improved with the introduction of conventionalcassette-based disposable tubing sets. With the newer conventionaldesigns, a small custom component is added to the tubing set to providean easier method for loading the disposable tubing set into the pump.However, certain currently available devices require careful alignmentof the cassette to the pump features. This can add new complications andsafety hazards.

Many cassette based fluid delivery systems require that the user slide arespective cassette into a cavity. Subsequent to insertion, a respectivelever can be used to lock the cassette into place. In these cases, thetube set is obstructed from view, making it difficult to remedy a jam orfailure. This can lead to delays in delivery of fluid to a respectivepatient.

In accordance with use of other conventional cassette-based loadingdesigns, it is required that the mechanical interfaces to the pump areengaged manually. In other words, the force necessary to engage the pumpmust be completely provided by the user handling the cassette. This canbe problematic for a number of reasons. For example, conventionalinfusion pumps are often mounted on poles with wheels. Therefore, itrequires the user to use two hands to load the set: one hand tostabilize the pump/pole and the other hand to engage the set. Anotherproblem with conventional confusion pumps is that it can be difficult toproperly align the cassette to the pump. Improper alignment can lead tofrustration, errors or the misleading of the set, which can lead tounsafe operation.

BRIEF DESCRIPTION OF EMBODIMENTS

In contrast to conventional techniques, embodiments herein include afluid delivery system comprising: a control interface and multipleunique loading guides. In one embodiment, the control interface isdisposed in a cavity of the fluid delivery system. The control interfaceof the fluid delivery system is configured to accept a fluid pumpassembly. The multiple loading guides are retractable from the fluiddelivery system to retain and control movement of a facing of the fluidpump assembly to contact the control interface on the facing of thefluid delivery system. Subsequent to contacting the fluid pump assemblyto the control interface of the fluid delivery system, the fluiddelivery system is able to control a flow of fluid associated with thefluid pump assembly.

As mentioned, in one embodiment, the control interface is disposed in acavity of the fluid delivery system. The multiple loading guides can bedisposed at locations in proximity to the cavity, facilitating insertionof the fluid pump assembly into the cavity and mating of an interface ofthe fluid pump assembly to the control interface of the fluid deliverysystem.

In accordance with more specific embodiments, the fluid pump assemblycan be configured to include multiple tabs. The multiple tabs facilitateinsertion of the fluid pump assembly into the cavity. For example, themultiple tabs can be configured to slide (such as in a direction along afirst axis) into respective channels disposed in the loading guides. Asthe loading guides retract (such as in a direction along a second axis)into the fluid delivery system, they apply a respective force to themultiple tabs resulting in insertion of the fluid pump assembly into thecavity.

In one embodiment, the placement of the tabs of the fluid pump assemblyinto respective channels of the loading guides aligns the fluid pumpassembly (such as a disposable cassette) for proper contact of the fluidpump assembly to the control interface of the fluid delivery system. Aspreviously discussed, the control interface can be disposed in a cavityof the fluid delivery system.

In yet further more specific embodiments, each of the loading guides canbe configured to include a respective channel to retain a correspondingtab disposed on the fluid pump assembly. Any of one or more of thechannels in the loading guides can include a respective stop (channelblock) that prevents further sliding of a tab in the correspondingchannel or out of the channel. In one embodiment, the respective stopmatably aligns a pneumatic port on the fluid pump assembly to acorresponding pneumatic control port in a control interface of the fluiddelivery system.

By further way of example embodiment, during the fluid pump assemblyinsertion process, the multiple loading guides can be configured toslidably retract in unison to support substantially orthogonal insertionof the fluid pump assembly to the control interface of the fluiddelivery system.

Yet further embodiments herein include fabricating all or a portion ofthe fluid pump assembly and its respective components using transparentmaterial, enabling a respective caregiver to view through the fluid pumpassembly into a cavity of the fluid delivery system. Prior to insertion,respective spacings between the multiple loading guides (and tabs)provide a substantially unobstructed view of inserting the fluid pumpassembly into the cavity.

The fluid delivery system can include any suitable resource (such as amotor, user-controlled manual lever resource, etc.) to control movementof the multiple loading guides. In one embodiment, the fluid deliverysystem includes a user-controlled lever resource (manual lever) inmechanical communication with the multiple loading guides. Movement ofthe lever resource controls movement of the multiple loading guides.More specifically, in one embodiment, movement of the lever resourcecontrols the retractable movement of the multiple loading guides andinsertion and extraction (possibly in an orthogonal or near orthogonalmanner) of the fluid pump assembly with respect to the cavity andcorresponding control interface in the fluid delivery system.

In accordance with further embodiments, the user-controlled leverresource rotates about an axis and/or pivot. A force translatormechanism in the fluid delivery system receives a force produced basedon the rotational movement of the user-controlled lever resource withrespect to the axis and/or pivot. The translator mechanism converts theforce received from the rotational movement of the user-controlled leverresource into substantially orthogonal motion of the loading guides withrespect to the control interface, retracting the disposable cassetteinto or ejecting the disposable cassette out of a respective cavity ofthe fluid delivery system depending upon which way the lever resource ismoved.

In accordance with still further embodiments, the fluid delivery systemcan include one or more spring resources disposed between the leverresource and the loading guides. The one or more spring resourcesfacilitate conveyance of the received force (from the rotational motion)to the loading guides. In one embodiment, the one or more springresources pulls or pushes the loading guides with a fixed force (basedon the rotational motion), reducing the need for tight interfacetolerances between the fluid pump assembly and the control interface ofthe fluid delivery system.

Accordingly, embodiments herein provide an improved system, method,etc., of fast and error-free loading a disposable cassette into a cavityof a fluid delivery system. In one embodiment, as generally mentioned,the cassette (fluid pump assembly) is visible during all or a portion ofthe insertion/extraction process including after the fluid pump assemblyis completely mated to the pump mechanism in the cavity. Further, aspreviously discussed, a unique disposable cassette can be configured toinclude one or more loading tabs, which engage with specially designedretractable loading pins in the pump. In one embodiment, tab and pinarrangements can be configured in a manner such that the user of thefluid delivery system can insert the fluid pump assembly into the cavityof the fluid delivery system without substantial resistance. Use ofretractable pins/guides enables a respective user to view whether thefluid pump assembly (such as including a cassette) seats properly withinthe cavity.

In accordance with further embodiments, as mentioned, the frame of thefluid pump assembly can be made of transparent material to furtherenhance the ability to view whether the fluid pump assembly seatscorrectly in the cavity. The mechanism utilizes a lever providingmechanical advantage. When the user applies a force to the lever, theloading guides (or pin resources) retract, pulling the cassette towardsthe face of the pump. In one embodiment, during this action of pullingthe cassette towards the facing of the pump (such as into a respectivecavity of the fluid delivery system), all necessary mechanical drive andsensor interfaces are automatically aligned and mated. Thus, the userdoes not need to be concerned with alignment of any of the componentsafter the initial placement of the cassette into the loading pins. Inone embodiment, subsequent to loading, the cassette (fluid pumpassembly) is completely visible and any problems can easily be observedand corrected.

These and other more specific embodiments are disclosed in more detailbelow.

As discussed herein, techniques herein are well suited for insertion ofa disposable fluid pump assembly (such as a cassette) into a cavity of afluid delivery system that controls operation of a pump disposed in thefluid pump assembly. However, it should be noted that embodiments hereinare not limited to use in such applications and that the techniquesdiscussed herein are well suited for other applications as well.

Additionally, note that although each of the different features,techniques, configurations, etc., herein may be discussed in differentplaces of this disclosure, it is intended, where suitable, that each ofthe concepts optionally can be executed independently of each other orin combination with each other. Accordingly, the one or more presentinventions as described herein can be embodied and viewed in manydifferent ways.

Also, note that this preliminary discussion of embodiments hereinpurposefully does not specify every embodiment and/or incrementallynovel aspect of the present disclosure or claimed invention(s). Instead,this brief description only presents general embodiments andcorresponding points of novelty over conventional techniques. Foradditional summary, details, and/or possible perspectives (permutations)of the invention(s), the reader is directed to the Detailed Descriptionsection and corresponding figures of the present disclosure as furtherdiscussed below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an example diagram of a fluid delivery environment accordingto embodiments herein.

FIG. 2 is an example diagram illustrating detailed attributes of a fluidpump assembly according to embodiments herein.

FIG. 3 is an example perspective view diagram illustrating a fluid pumpassembly and corresponding exploded view of a fluid flow resistormechanism according to embodiments herein.

FIG. 4 is an example perspective view diagram illustrating a fluid pumpassembly and corresponding fluid delivery system according toembodiments herein.

FIG. 5 is an example diagram illustrating retraction of loading guidesinto a fluid delivery system according to embodiments herein.

FIGS. 6A, 6B, and 6C are example perspective view diagrams illustratinga sequence of inserting tabs of a fluid pump assembly into correspondingloading guides and retraction of the corresponding loading guides toengage the fluid pump assembly to the fluid delivery system according toembodiments herein.

FIGS. 7A, 7B, and 7C are example side view diagrams illustrating asequence of engaging a fluid pump assembly to a facing of a fluiddelivery system according to embodiments herein.

FIG. 8 is an example diagram illustrating a method according toembodiments herein.

FIGS. 9 and 10 are example functional side view diagrams illustratingtranslation of rotational motion into substantially simultaneousretraction of the loading guides according to embodiments herein.

FIG. 11A is an example perspective view diagram of a fluid deliverysystem according to embodiments herein.

FIG. 11B is a cross-sectional view diagram (of section A-A) illustratingattributes of ledges and tapered surfaces of the fluid delivery systemaccording to embodiments herein.

The foregoing and other objects, features, and advantages of theinvention will be apparent from the following more particulardescription of preferred embodiments herein, as illustrated in theaccompanying drawings in which like reference characters refer to thesame parts throughout the different views. The drawings are notnecessarily to scale, with emphasis instead being placed uponillustrating the embodiments, principles, concepts, etc.

DETAILED DESCRIPTION AND FURTHER SUMMARY OF EMBODIMENTS

More specifically, FIG. 1 is an example diagram illustrating a fluiddelivery environment and fluid delivery system according to embodimentsherein.

As shown, the fluid delivery system 100 disposed in fluid deliveryenvironment 101 includes a fluid source 189-1 (first fluid source),fluid source 189-2 (second fluid source), pump control unit 120, anddisposable tube assembly. In one embodiment, the disposable tubeassembly includes fluid pump assembly 185 such as a cassette as well astube 165-1, tube 165-2, and tube 165-3.

Tube 165-1 conveys fluid from fluid source 189-1 to fluid pump assembly185. Tube 165-2 conveys fluid from fluid source 189-2 to fluid pumpassembly 185. Tube 165-3 conveys fluid from fluid pump assembly 185 torecipient 108.

In this example embodiment, fluid pump assembly 185 is already insertedin a corresponding cavity of pump control unit 120. Caregiver 106programs the fluid delivery system 100 to deliver fluid at a desiredrate to recipient 108.

In general, based on a desired flow rate set by caregiver 106, duringoperation, pump control unit 120 controls a corresponding pump resource(such as one or more diaphragm pumps), valves, etc., in fluid pumpassembly 185 to deliver fluid from fluid sources 189 through tube 165-1,fluid pump assembly 185, and tube 165-3 to recipient 108. The recipient108 can be any suitable type of entity such as a human, a pet, acontainer, etc.

FIG. 2 is an example diagram illustrating a disposable fluid pumpassembly and corresponding pump control unit according to embodimentsherein.

As previously discussed, embodiments herein include fluid pump assembly185 that insertably fits into a corresponding cavity 204 of fluiddelivery system 100.

In one embodiment, in addition to including tube 165-1 and tube 165-2,as previously discussed, note again that a respective disposableassembly can further include tube 165-3. As mentioned, a combination ofresources including tube 165-1, tube 165-2, tube 165-3, and fluid pumpassembly 185 represent an assembly such as a disposable tube set. As itsname suggests, the disposable tube set can be thrown away after it isused to deliver a corresponding fluid to an entity such as recipient 108(such as a patient).

The pump controller unit 120 can be used in conjunction with each newdisposable tube set to deliver fluid to other patients. Thus, the pumpcontroller unit 120 is reusable across multiple patients. However, asmentioned, each respective disposable tube set is typically used todeliver fluid to only one patient.

As shown and as previously discussed, insertion of fluid pump assembly185 into the corresponding cavity 204 of the fluid delivery system 100provides coupling between resources in the fluid pump assembly 185 andcontrol resources in pump control unit 120.

For example, when the fluid pump assembly 185 is inserted into cavity204 of the fluid delivery system 100, valve actuator resource 192 (e.g.,a valve controller) becomes coupled to corresponding valves 160 (valve160-1 and valve 160-2) in the fluid pump assembly 185.

During pump operation, valve actuator resource 192 in the pump controlunit 120 controls settings of valves 160-1 and 160-2 to respective openand closed states, allowing and restricting a flow of fluid.

Further in this example embodiment, note that valve actuator resource194 in the pump controller unit 120 controls opening and closing ofvalve 160-3 to control a flow of fluid along fluid pathway 115 torecipient 182.

The valve actuator resources in the pump controller unit 120 can controlthe respective valves 160 in any suitable manner depending on the typeof the valves. For example, depending on the type of valves, via controlinput from the valve actuator resources in the pump control unit 120,the valves 160 can be electromechanically controlled, hydraulicallycontrolled, pneumatically controlled, etc.

Thus, when pumping respective fluid from one or more fluid sources 189,the pump control unit 120 controls valves 160 to respective open andclosed states as desired.

As a more specific example, to draw fluid from the first fluid source189-1 through the primary inlet 170-1 into a respective pump chamber offluid pump 110, the pump control unit 120 opens valve 160-1 and closesvalve 160-2 and valve 160-3. While only valve 160-1 is open, the pumpcontrol unit 120 controls pump chamber actuator 193 to draw fluidthrough tube 165-1 into the pump chamber of fluid pump 110.

After drawing a desired or sufficient amount of fluid into the pumpchamber of fluid pump 110, the pump control unit 120 closes valves 160-1and valve 160-2 and opens valve 160-3. While only valve 160-3 is open,the pump control unit 120 controls pump chamber actuator 193 to forcethe fluid in the pump chamber fluid pump 110 downstream along fluidpathway 115.

Note further that embodiments herein can include switching betweendrawing fluids from the different fluid sources 189 and delivering suchfluids to the recipient 108. For example, in a first pump cycle, thepump controller unit 120 can be configured to control valves 160 (valve160-1, valve 160-2, valve 160-3) to deliver fluid from fluid source189-1 to recipient 108 in a manner as previously discussed; in a secondpump cycle, the pump controller unit 120 can be configured to controlvalves 160 to deliver fluid from fluid source 189-2 to recipient 108 ina similar manner as previously discussed; in a third pump cycle, thepump controller unit 120 can be configured to control valves 160 todeliver fluid from fluid source 189-1 to recipient 108 in a manner aspreviously discussed; in a fourth pump cycle, the pump controller unit120 can be configured to control valves 160 to deliver fluid from fluidsource 189-2 to recipient 108 in a similar manner as previouslydiscussed; and so on.

Accordingly, a single fluid pump 110 (such as diaphragm pump) in fluidpump assembly 185 can be used to switch between delivering fluid fromdifferent sources 189 to a recipient 108. If desired, the fluid pumpassembly 185 can be configured to include multiple fluid pumps insteadof a single fluid pump 110.

As further shown, downstream in fluid pathway 115 with respect to valve160-3, note that fluid pump assembly 185 can further include gaselimination filter 140.

In one embodiment, as shown, the gas elimination filter 140 is disposedupstream with respect to fluid flow resistor assembly 145. Disposing thegas elimination filter 140 upstream with respect to the fluid flowresistor assembly 145 ensures that the gas elimination filter 140remains under positive pressure (e.g., a higher pressure than a pressureat a location monitored by pressure sensor resource 150 as discussedbelow) during fluid delivery.

As its name suggests, and as previously discussed, the gas eliminationfilter 140 disposed in fluid pump assembly 185 removes any air or gasesfrom the fluid traveling downstream along fluid pathway 115 towardsfluid flow resistor assembly 145. In one embodiment, the gas eliminationfilter 140 vents any detected gas out of the fluid pathway 115 into openatmosphere (open air as exhaust).

In accordance with further embodiments, fluid resistor drive 195controls a degree to which the fluid flow resistor assembly 145 resistsa corresponding flow of the fluid along fluid pathway 115 towardsrecipient 108. Increased resistance provided by the fluid flow resistorassembly 145 reduces a flow rate of fluid long pathway 115 to recipient108. Decreased resistance provided by the fluid flow resistor assembly145 increases a flow rate of fluid along pathway 115 to recipient 108.

Port 310-1 (such as an input port) of the fluid flow resistor assembly145 receives fluid passing along fluid pathway 115 through gaselimination filter 140. Port 310-2 (such as an output port) of the fluidflow resistor assembly outputs respective fluid in fluid pathway 115downstream towards pressure sensor resource 150.

In a similar manner as previously discussed, the fluid flow resistorassembly 145 can be controlled in any suitable manner. For example, thefluid flow resistor assembly 145 can be electromechanically controlled,hydraulically controlled, pneumatically controlled, etc., via fluidresistor drive 195.

In accordance with yet further embodiments, fluid pump assembly 185further includes pressure sensor resource 150 disposed in fluid pathway115 downstream with respect to fluid flow resistor assembly 145.

In one non-limiting example embodiment, the pressure sensor resource 150monitors a pressure of fluid disposed and passing through acorresponding location along fluid pathway 115 as shown. Via pressuresensor circuitry 196 in communication with pressure sensor resource 150,a flow-control monitoring algorithm executed by the pump control unit120 is able to determine a pressure of fluid delivered to the recipient108 at a downstream location in fluid pathway 115 with respect to thefluid flow resistor assembly 145.

In one embodiment, the pressure sensor circuitry 196 in the pump controlunit 120 detects when there is a blockage downstream that preventsdelivery of corresponding fluid to a recipient 108. For example, in oneembodiment, when the pressure sensor circuitry 196 detects that thepressure at the location monitored by pressure sensor resource 150 isabove a threshold value, the pressure sensor circuitry 196 generates acorresponding signal indicating a blockage condition and/or inability todeliver fluid to the recipient 108. Detecting pressure below thethreshold value generally indicates that there is no blockage downstreamand that the fluid is being delivered through the fluid pathway 115 tothe recipient 108, which is desired.

During pumping of fluid to recipient 108 via control of the fluid pump110 as previously discussed, gas elimination filter 140 typicallyremoves gas from the infusion line (fluid pathway 115) before it reachesthe detector elements 130.

If the gas elimination filter 140 fails for some reason, and bubbles aredetected by one or more detector elements 130-1 and 130-2 monitoring aflow of fluid through pathway 115, the bubble detector circuitry 172generates a corresponding signal to pump control unit 120 to close thefluid flow resistor assembly 145 and/or valves 160 to stop fluid flow.The corresponding signal indicates to the pump control unit 120 todiscontinue delivery of corresponding fluid to the recipient 108. Thisprevents any gas in the fluid in fluid pathway 115 from being deliveredto recipient 108 in the event that the gas elimination filter 140happens to fail to remove gas.

By further way of non-limiting example, in one embodiment, in responseto receiving an indication that bubbles are detected in fluid beingdelivered to the corresponding recipient 108, the pump control unit 120can be configured to close one or more valves such as valve 160-1, valve160-2, valve 160-3 and/or deactivate fluid pump 110 to discontinuedelivery of fluid to the recipient 108.

In accordance with further embodiments, fluid pumped assembly 185includes a frame 245 (made of plastic or other suitable material) toretain resources such as valves 160, fluid pump 110, gas eliminationfilter 140, fluid flow resistor assembly 145, pressure sensor resource150, openings 135, pathway 115, etc.

In one embodiment, the frame 245 is made of transparent material,facilitating a view of each of the above-mentioned resources. In otherwords, the caregiver 106 is able to see through the frame 245 and viewthe different resources such as valve 160-1, valve 160-2, fluid pump110, valve 160-3, gas elimination filter 140, etc.

Thus, in summary, the frame 245 of fluid pump assembly 185 includesfluid pathway 115. As previously discussed, the fluid pathway 115includes gas elimination filter 140 and a flow resistor 145. The gaselimination filter 140 is disposed in the fluid pathway 115 downstreamof the fluid pump 110. The flow resistor 145 is disposed in the fluidpathway 115 downstream from the gas elimination filter 140. Aspreviously discussed, further embodiments of the fluid pump assembly 185can include a pressure sensor 150 as shown. Pressure sensor 150 monitorsa pressure of fluid in the fluid pathway 115 at a location in the fluidpathway between the flow resistor 145 and the location of the fluidpathway 115 between the first detector element 130-1 and second detectorelement 130-2.

As further shown, the frame 245 of the fluid pump assembly 185 caninclude tab 275-1, tab 275-2, tab 275-3, and tab 275-4 (collectively,tabs 275). As further discussed herein, the tabs 275 facilitate couplingor mating of the fluid pump assembly 185 to the fluid delivery system100.

FIG. 3 is an example perspective view diagram illustrating a fluid pumpassembly and corresponding exploded view of a fluid flow resistorassembly according to embodiments herein.

In this example embodiment, the frame 245 of the fluid pump assembly 185includes tabs 275 spaced apart from each other along respective edges offrame 245.

Note that use of spaced tabs is shown by way of non-limiting exampleembodiment only. If desired, the pair of tabs 275-3 and 275-4 disposedalong a respective edge 386-2 of the frame 245 can be formed into asingle tab along edge 386-2. For example, the spacing between tabs 275-3and 275-4 can be filled in with appropriate material (such astransparent material) to form a single tab. Similarly, if desired, thespacing between tabs 275-1 and 275-2 can be filled in with appropriatematerial to form a single tab along edge 386-1.

In accordance with alternative embodiments, each of the edges 386 caninclude additional tabs. For example, edge 386-1 can include any numberof one or more additional tabs disposed between or outside of tabs 275-1and 275-2. Edge 386-2 can include any number of one or more additionaltabs disposed between or outside of tabs 275-3 and 275-4.

Further in this example embodiment, the fluid flow resistor assembly145-1 includes a first flow control assembly element 335 (such as a gearelement), a second flow control assembly element (such as seal 325),port 310-1, port 310-2, and fastener 355. In one embodiment, the seal325 is an elastomeric seal (a.k.a., rubber).

The seal 325 includes ports 327-1 and 327-2.

Note that port 310-1, port 310-2, port 327-1, and port 327-2 can belocated at any suitable location with respect to flow control assemblyelement 335 and axis 210.

The first flow control assembly element 335 and ports 310 disposed influid pump assembly 185 can be made of rigid plastic or other suitablematerial. As shown, the ports 310 protrude from the respective surfaceof fluid pump assembly 185. Alternatively, the ports 310 can be flushwith respect to a surface of the fluid pump assembly 185. Afterinstallation, fastener 355 (such as formed via gluing, welding,snap-fit, etc.)

secures flow control assembly element 335 to the fluid pump assembly185, compressing facing 340 of the flow control assembly element 335 toa respective surface of seal 325. The opposite facing of seal 325 iscompressed and in contact with the surface 349 of the fluid pumpassembly 185.

Port 327-1 provides a fluid-tight pathway between port 310-1 of fluidpump assembly 185 and a first location on a respective surface of facing340. Port 327-2 provides a fluid-tight pathway between port 310-2 and asecond location on the respective surface of facing 340.

Further, as previously discussed, fluid pump assembly 185 includes fluidpump 110 (any suitable type of pump such as a diaphragm pump assembly).The pump control unit 120 controls settings of the respective valves 160as well as a flow of gas (such as a negative pressure) to port 144-2 ofthe fluid pump 110 to draw fluid from one or more respective fluidsources 189 into a respective chamber fluid pump 110. Subsequentapplication of positive pressure to the port (while valves 160-1 and160-2 are closed) pushes fluid in the chamber of the fluid pump 110downstream along fluid pathway 115.

Yet further, as previously discussed, fluid pathway 115 includes fluidflow resistor assembly 145-1 controlled by fluid resistor drive 195. Inone embodiment, the fluid resistant drive 195 controls an angular orrotational orientation 375 of the flow control assembly element 335 withrespect to axis 210 to control a respective flow of fluid further downfluid pathway 115 through tube 105-3 to recipient 108.

Additional details of controlling flow are discussed in related U.S.patent application Ser. No. 14/540,081 entitled “FLUID FLOW REGULATORASSEMBLY,” (Attorney Docket No. FLU13-05), filed on Nov. 13, 2014, theentire teachings of which are incorporated herein by this reference.

In one embodiment, as will be further discussed below, the port 310-1receives fluid passing along fluid pathway 115 from gas eliminationfilter 140. Fluid received from port 310-1 and port 327-1 passes througha channel disposed between facing 340 of the flow control assemblyelement 335 and opposing facing of seal 325 to port 327-2 and port310-2. Port 310-2 further conveys the fluid along the fluid pathway 115of fluid pump assembly 185 towards pressure sensor 150 as previouslydiscussed.

Note that, depending on the embodiment, the radial distance between axis210 and a location of port 310-1 and port 327-1 and a location of port310-2 and port 327-2 can be the same or different value as furtherdiscussed below.

In accordance with further embodiments, the flow control assemblyelement 335 is rotatable with respect to axis 210. The fluid resistordrive 195 controls an orientation of the flow control assembly element335 (adjusting a positioning of the tapered channel with respect to theports 310 and/or ports 327) to control a flow of fluid from the fluidsource to the target recipient 108.

FIG. 4 is an example perspective view diagram illustrating a fluiddelivery system and fluid pump assembly according to embodiments herein.

As shown, a surface or facing 410 of the fluid delivery system 100 canbe configured to include cavity 420 for receiving the fluid pumpassembly 185. Inside cavity 420 resides control interface 492 (controlinterface 492-1, control interface 492-2, etc.). If desired, as analternative to residing in cavity 420, control interface 492 can residedirectly on a surface of the fluid delivery system 100, outside acavity.

Additionally, as shown, the fluid delivery system 100 can be configuredto further include multiple loading guides 475 (e.g., loading guide475-1, loading guide 475-2, loading guide 475-3, and loading guide475-4) that retract into facing 410 of the fluid delivery system 100 inaccordance with input from a respective caregiver 106. FIG. 4illustrates the loading guides 475 in a fully extended (protruding)state prior to being retracted into the fluid delivery system 100.

In one embodiment, the multiple loading guides 475 are disposed atlocations around a periphery of cavity 420 (such as in-line with edges409) disposed on facing 410 of the fluid delivery system 100. Note againthat depending upon the embodiment, control interface 492 forcontrolling the fluid pump assembly 185 can reside inside or outside ofcavity 420.

As further shown, the cavity 420 includes tapered surface 408-1 andtapered surface 408-2. The tapered surfaces 408 help to center the fluidpump assembly 185 with respect to the cavity 420. That is, when the usermoves the fluid pump assembly 185 for insertion into cavity 420, thetapered surface 408-2 serves to guide the tab 275-1 and tab 275-2 tocome in contact with ledge 409-2; the tapered surface 408-1 serves toguide the tab 275-3 and tab 275-4 come in contact with ledge 409-1.Thus, presence of the ledges 409 in the cavity 420 and tabs 275 on thefluid pump assembly 185 prevent insertion of the flow pump assembly intocavity 420.

In one embodiment, the width between ledge 409-1 and ledge 409-2 ischosen to be substantially equal to a width across frame 245 between tab275-2 and tab 275-4.

The tabs 275 on frame 245 slide along the axial lengths of ledges 409such that the ledges 409 serve to guide the respective tabs 275 intochannels 485 of the guides 475. In other words, when the loading guides475 are extended outward from cavity 420 as shown in FIG. 4, an innersurface of channel 485-3 (associated with loading guide 475-3) and aninner surface of channel 485-4 (associated with loading guide 475-4)substantially align with the surface of ledge 409-1. Similarly, when theloading guides 475 are extended outward from cavity 420 as shown in FIG.4, an inner surface of channel 485-1 (associated with loading guide475-1) and an inner surface of channel 485-2 (associated with loadingguide 475-2) substantially align with the surface of ledge 409-2.

As previously discussed, inward movement of the loading guides 475 canbe controlled by a respective resource such as a lever 445 of the fluiddelivery system 100. For example, as further discussed herein, movementof the lever 445 to an open position causes the loading guides 475 toprotrude from fluid delivery system 100 as shown in FIG. 4; movement ofthe lever 445 from the open position to a closed position causes theloading guides to retract into the fluid delivery system 100 (as shownin FIG. 5). Accordingly, embodiments herein can include auser-controlled lever resource 445 in mechanical communication with themultiple loading guides 475; the lever resource 445 controls movement ofthe multiple loading guides 475.

Each of the loading guides 475 can include a respective channel toreceive a tab disposed on the fluid pump assembly 185. For example, asshown, guide 475-1 includes channel 485-1 to receive tab 275-1; guide475-2 includes channel 485-2 to receive tab 275-2; guide 475-3 includeschannel 485-3 to receive tab 275-3; and guide 475-4 includes channel485-4 to receive tab 275-4.

As further shown, each of one or more of the tabs 275 can include arespective stop to prevent further sliding of the tab through arespective channel. For example, in one embodiment, the channel 485-4 ofguide 475-4 includes stop 486-4; the channel 485-2 of opposing guide475-2 includes stop 486-2.

As will be discussed further below, the stops 486 facilitate alignmentof fluid pump assembly 185 with respect to control interface 492disposed in cavity 420. More specifically, the stops 486 facilitatealignment of the port 144-2 with the center of corresponding controlinterface 492-1; stops 486 align the fluid control assembly element 335with control interface 492-2; and so on. Accordingly, sliding of tabs275 along respective ledges 409 into respective channels 485 of theloading guides 475 aligns the fluid pump assembly 185 for insertion intothe cavity 420.

Subsequent to placement of the tabs 275 into the loading guides 475,prior to retracting of the loading guides into the fluid delivery system100 using lever 445, respective spacings between the multiple loadingguides 475 and pairs of tabs 275 provides the caregiver 106 asubstantially unobstructed view of inserting the fluid pump assembly 185into the cavity 420.

In one embodiment, the multiple loading guides 475 slidably retract inunison to support substantially orthogonal insertion of the fluid pumpassembly 185 into the cavity 420 of the fluid delivery system 100. Inone embodiment, sidewalls of the cavity 420 further facilitate: matablealignment of the port 144-2 with corresponding control interface 492-1in cavity 420, matable alignment of the fluid control assembly element335 with control interface 492-2 in cavity 420; and so on.

FIG. 5 is an example diagram illustrating retraction of the loadingguides into the fluid delivery system according to embodiments herein.

As shown, movement of the lever resource 445 to be flush with respect toa surface of the fluid delivery system 100 causes the loading guides 475to retract into the fluid delivery system 100. In this example, forpurposes of illustrating movement of the guides 475, the lever resource445 was moved to the closed position without insertion of a respectivefluid pump assembly 185 in guides 475.

As previously discussed, the multiple loading guides 475 can beconfigured to slidably retract in unison to support substantiallyorthogonal insertion of a fluid pump assembly 185 into the cavity 420 ofthe fluid delivery system 100

FIGS. 6A, 6B, and 6C are example perspective view diagrams illustratinga sequence of inserting tabs of a fluid pump assembly into correspondingloading guides and retraction of the corresponding loading guides toengage the fluid pump assembly to the fluid delivery system according toembodiments herein.

As shown in FIG. 6A, while lever resource 445 is in an open positionpulled away from the fluid delivery system 100, a respective caregiver106 slides the frame 245 of the fluid pump assembly 185 along axis 610and ledges 409 to move tabs 275 into respective channels 485 of loadingguides 475.

As shown in FIG. 6B, subsequent to sliding of the tabs 275 intorespective channels 485 of the loading guides 475, the caregiver 106pushes on lever resource 445. As previously discussed, this causes theloading guides 475 to retract into the fluid delivery system 100.Because the tabs 275 reside in respective channels 485 of the loadingguides 475, retraction of the loading guides 475 causes: insertion ofthe fluid pump assembly 185 into respective cavity 420; mating of port144-2 to the control interface 492-1; and coupling of fluid controlassembly element 335 to control interface 492-2.

FIG. 6C illustrates final insertion of the fluid pump assembly 185 intocavity 420. At such time, when the fluid pump assembly 185 is fullyinserted into the cavity 420, the pump control unit 120 in fluiddelivery system 100 is able to control a flow of fluid through the fluidpathway 115 of the fluid pump assembly 185. More specifically, valveactuator resource 192 is able to control valve 160-1 and valve 160-2;pump chamber actuator 193 is able to control fluid pump 110; valveactuator resource 194 is able to control valves 160-3; fluid resistordrive 195 is able to control fluid flow resistor assembly 145; pressuresensor circuitry 196 is able to sense pressure associated with pressuresensor resource 150 disposed in fluid pathway 115; detector circuitry172 is able to detect the flow of gas bubbles through tube 165-3.

FIGS. 7A, 7B, and 7C are example side view diagrams illustrating asequence of engaging a fluid pump assembly to a facing of a fluiddelivery system according to embodiments herein.

As shown in FIG. 7A, while lever resource 445 is in an open positionpulled away from the fluid delivery system 100, a respective caregiver106 moves frame 245 as shown along axis 620. When the tabs 275 come incontact with the ledges 409, the caregiver 106 then slides the frame 245of the fluid pump assembly 185 along axis 610 and ledges 409 (in adownward direction) to move respective tabs 275 of the frame 245 intorespective channels 485 of loading guides 475. In one embodiment, axis620 is substantially orthogonal to axis 610.

As previously discussed, a portion of a peripheral edge of the cavity420 includes tapered surfaces 408 to facilitate centering of the fluidpump assembly 185 with respect to cavity 420 as the user moves the fluidpump assembly 185 towards cavity 420. The caregiver 106 then slides tabs275 along surfaces of ledges 409 into respective channels 485 of theloading guides 475.

As shown in FIG. 7B, subsequent to sliding of the tabs 275 intorespective channels 485 of the loading guides 475, the caregiver 106pushes on lever resource 445 as shown. As previously discussed, thiscauses the loading guides 475 to retract into the fluid delivery system100. Because the tabs 275 reside in respective channels 485 of theloading guides 475, retraction of the loading guides 475 causesinsertion of the fluid pump assembly 185 into respective cavity 420.

FIG. 7C illustrates final insertion of the fluid pump assembly 185 intocavity 420.

As previously discussed, at such time when the fluid pump assembly 185is fully inserted into the cavity 420, the pump control unit 120 influid delivery system 100 is able to control a flow of fluid through thefluid pathway 115 of the fluid pump assembly 185. More specifically,when the fluid pump assembly 185 is fully inserted into cavity 420,valve actuator resource 192 controls valve 160-1 and valve 160-2; pumpchamber actuator 193 is able to control fluid pump 110; valve actuatorresource 194 controls valves 160-3; fluid resistor drive 195 controlsfluid flow resistor assembly 145; pressure sensor circuitry 196 sensespressure associated with pressure sensor resource 150 disposed in fluidpathway 115; detector circuitry 172 detects the flow of gas bubblesthrough tube 165-3.

FIGS. 9 and 10 are example functional side view diagrams illustratingconversion of rotational motion into translational or parallel motion ofthe loading guides according to embodiments herein.

As shown in FIG. 9, the fluid delivery system includes lever resource445, linkage 960-1, linkage 960-2, linkage 960-3, rigid member 950,spring resource 930-1, spring resource 930-2, and loading guides 475. Inthis example embodiment, loading guide 475-1 resides and slides withintrack 975-1 (such as a linear bearing). Loading guide 475-2 resides andslides within track 975-2 (such as a linear bearing).

In one embodiment, each of the linkages 960-1, 960-2, 960-3, etc., aremade from rigid material.

To retract the loading guides 475 into respective tracks 975, afterinserting the fluid pump assembly 185 into the respective holdingchannels of the loading guides 475, the user pushes on lever resource445, causing it to move member 950 to the right as shown. For example,lever resource 445 rotates about pivot 920 and/or axis z as previouslydiscussed. Such motion of the lever resource 445 causes linkage 960 tomove member 950 to the right. This causes the member 950 to exert apulling force on each of the spring resources 930-1 and 930-2, causingmovement of the distal tips of the loading guides 475-1 and 475-2 tomove from the open position to the closed position. Thus, the leverresource 445 controls movement of the loading guides 475 alongrespective tracks 975.

FIG. 10 illustrates a corresponding position of member 950 as well assprings 930 and loading guides 475 after the lever resource 445 has beenpushed to the full closed position. At such time, the member 950 isfurthest away from lever resource 445.

Movement of the member 950 to this far right position causes the springresource 930-1 to retract loading guide 475-1 into the fluid deliverysystem 100 to the closed position. Additionally, movement of the member950 to this far right position causes the spring resource 930-2 toretract loading guide 475-2 into the fluid delivery system 100 to theclosed position. In such an instance, as previously discussed, theloading guides 475 fully draw the fluid pump assembly 185 into cavity420 of the fluid delivery system 100.

To remove the fluid pump assembly 185 from cavity 0420, the user (suchas caregiver 106) pulls on lever resource 445 away from the fluiddelivery system 100. This causes linkage 960 to move member 950 to theleft. Movement of member 950 to the left causes the spring resources 930to apply a corresponding pushing force on loading guides 475 to movethem to the open position.

Accordingly, a combination of the linkage 960, member 950, and springresources act as a translator mechanism. For example, the linkage 960receives a force to pull in or push out loading guides 475 based onforce from rotational movement of the user-controlled lever resource 445with respect to the pivot 920 (or z-axis). During operation, thetranslator mechanism (combination of linkage 960, member 950, and springresources 930) converts the force received from rotational movement ofthe user-controlled lever resource 445 into substantially orthogonaltranslational motion of the loading guides 475 (in or out depending on amotion of the lever resource 445) with respect to the control interface485 disposed in cavity 420.

Note that inclusion of multiple spring resources 930 (such as one springresource for each loading guide) is shown by way of non-limiting exampleonly. In certain embodiments, a single spring resource can be used toprovide a distribution of a force (push or pull) to each of the loadingguides 475 based on movement of the lever resource 445.

In one embodiment, compliance in the pins (loading guides 475) allowsthe system to more tightly control proper alignment of the cassette(fluid pump assembly 185) into the cavity 420 during insertion.Additionally, in one embodiment, compliance can also allow the system tocontrol the maximum force placed on the tabs 275 and respective cassetteduring loading and operating.

FIG. 11A is a perspective view diagram of a fluid delivery systemaccording to embodiments herein. As previously discussed, fluid pumpassembly 185 retracts into cavity 420 via movement and control ofrespecting loading guides 475.

FIG. 11B is a cross-sectional view diagram (of section A-A) illustratingattributes of ledges and tapered surfaces of the fluid delivery systemaccording to embodiments herein. As shown, and as previously discussed,tabs 275-1 and 275-3 extend beyond a width of ledges 409-1 and 409-2.Tapered surfaces 408-1 and 408-2 facilitate guidance of the tabs 275 ofthe fluid pump assembly 185 into ledges 409. Subsequent to moving tabs275 into respective channels of loading guides 475, loading guides 475retract to apply a force on tabs 475, drawing the fluid pump assembly185 into cavity 420.

Further functionality supported by the different resources will now bediscussed via the flowchart in FIG. 8. Note that the steps in theflowcharts below can be executed in any suitable order. Morespecifically, FIG. 8 is a flowchart 800 illustrating an example methodaccording to embodiments herein. Note that there may be some overlapwith respect to concepts as discussed above.

In processing block 810, a caregiver 106 receives a fluid pump assembly185.

In processing block 820, the caregiver 106 inserts the fluid pumpassembly 185 into multiple retractable loading guides 275 protrudingfrom the facing of fluid delivery system 100.

In sub-processing block 825, the caregiver 106 inserts tabs 275 of thefluid pump assembly 185 into respective channels of the loading guides.Insertion of the tabs into the channels aligns the fluid pump assembly185 for subsequent insertion into the cavity 204.

In processing block 830, the caregiver 106 initiates movement of themultiple retractable loading guides, resulting in insertion of the fluidpump assembly 185 into the cavity 204 of the fluid delivery system 100.Spacings between the retractable loading guides provides the caregiver106 an unobstructed view of the insertion of the fluid pump assembly 185into the cavity 204.

In sub-processing block 835, via application of a force to the leverresource in communication with the multiple loading guides, thecaregiver 106 controls movement of the multiple loading guides 475.Because the tabs 275 of the fluid pump assembly 185 are disposed inchannels of the multiple loading guides 475, movement of the multipleloading guides 275 causes movement of the fluid pump assembly 185 intoand out of the cavity 204 depending upon whether the caregiver 106pushes the lever resource 445 in or pulls the lever resource 445 out. Aspreviously discussed, in one embodiment, the movement of the multipleretractable loading guides 475 causes substantial orthogonal insertionof the fluid pump assembly into the cavity 204.

Note again that techniques herein are well suited for use in anysuitable type of fluid delivery systems. However, it should be notedthat embodiments herein are not limited to use in such applications andthat the techniques discussed herein are well suited for otherapplications as well.

Based on the description set forth herein, numerous specific detailshave been set forth to provide a thorough understanding of claimedsubject matter. However, it will be understood by those skilled in theart that claimed subject matter may be practiced without these specificdetails. In other instances, methods, apparatuses, systems, etc., thatwould be known by one of ordinary skill have not been described indetail so as not to obscure claimed subject matter. Some portions of thedetailed description have been presented in terms of algorithms orsymbolic representations of operations on data bits or binary digitalsignals stored within a computing system memory, such as a computermemory. These algorithmic descriptions or representations are examplesof techniques used by those of ordinary skill in the data processingarts to convey the substance of their work to others skilled in the art.An algorithm as described herein, and generally, is considered to be aself-consistent sequence of operations or similar processing leading toa desired result. In this context, operations or processing involvephysical manipulation of physical quantities. Typically, although notnecessarily, such quantities may take the form of electrical or magneticsignals capable of being stored, transferred, combined, compared orotherwise manipulated. It has been convenient at times, principally forreasons of common usage, to refer to such signals as bits, data, values,elements, symbols, characters, terms, numbers, numerals or the like. Itshould be understood, however, that all of these and similar terms areto be associated with appropriate physical quantities and are merelyconvenient labels. Unless specifically stated otherwise, as apparentfrom the following discussion, it is appreciated that throughout thisspecification discussions utilizing terms such as “processing,”“computing,” “calculating,” “determining” or the like refer to actionsor processes of a computing platform, such as a computer or a similarelectronic computing device, that manipulates or transforms datarepresented as physical electronic or magnetic quantities withinmemories, registers, or other information storage devices, transmissiondevices, or display devices of the computing platform.

While this invention has been particularly shown and described withreferences to preferred embodiments thereof, it will be understood bythose skilled in the art that various changes in form and details may bemade therein without departing from the spirit and scope of the presentapplication as defined by the appended claims. Such variations areintended to be covered by the scope of this present application. Assuch, the foregoing description of embodiments of the presentapplication is not intended to be limiting. Rather, any limitations tothe invention are presented in the following claims.

1. A fluid delivery system comprising: a cavity in which to receive afluid pump assembly; a pump control interface disposed in the cavity,the pump control interface operable to control the fluid pump assembly;and multiple retractable loading guides to retain and align the fluidpump assembly, movement of the multiple retractable loading guidesoperable to matably contact the aligned fluid pump assembly to thecontrol interface in the cavity.
 2. The fluid delivery system as inclaim 1, wherein the multiple loading guides include correspondingchannels in which to retain tabs of the fluid pump assembly, thecorresponding channels of the multiple retractable loading guidesoperable to align the fluid pump assembly for insertion into the cavity.3. The fluid delivery system as in claim 1 further comprising: a leverresource in communication with the multiple retractable loading guides,movement of the lever resource producing the movement of the multipleretractable loading guides.
 4. The fluid delivery system as in claim 3further comprising: at least one spring resource disposed between thelever resource and the multiple retractable loading guides, the at leastone spring resource facilitating conveyance of a received force from thelever to the multiple retractable loading guides to control movement ofthe fluid pump assembly into the cavity.
 5. The fluid delivery system asin claim 1, wherein the multiple retractable loading guides slidablyretract in unison to support substantially orthogonal insertion of thedisposable fluid pump assembly into the cavity.
 6. The fluid deliverysystem as in claim 1, wherein the multiple retractable loading guidesare disposed at locations around a periphery of the cavity, theperiphery disposed on a facing of the fluid delivery system.
 7. Thefluid delivery system as in claim 1, wherein the cavity includes ledgeson which to guide the fluid pump assembly into the multiple retractableloading guides.
 8. The fluid delivery system as in claim 1, wherein thecavity includes ledges on which to guide tabs of the fluid pump assemblyinto respective channels of the multiple retractable loading guides. 9.The fluid delivery system as in claim 8, wherein the tabs are disposedon edges of fluid pump assembly.
 10. The fluid delivery system as inclaim 1, wherein the movement of the multiple retractable loading guidesis orthogonal with respect to a facing of the fluid delivery system 11.The fluid delivery system as in claim 1, wherein respective channels ofthe multiple retractable loading guides receive tabs of the fluid pumpassembly in a first direction, which is orthogonal to a second directionin which the multiple retractable loading guides move the disposablefluid pump assembly into the cavity.
 12. The fluid delivery system as inclaim 1, wherein the multiple retractable loading guides are operable toat least temporarily retain the disposable fluid pump assembly at aposition external to the cavity prior to insertion of the disposablefluid pump assembly into the cavity.
 13. The fluid delivery system as inclaim 1, wherein the multiple retractable loading guides protrude from afacing of the fluid delivery system to receive and retain the fluid pumpassembly.
 14. The fluid delivery system as in claim 1, wherein each ofthe multiple retractable loading guides protrude in a same orthogonaldirection with respect to a facing of the fluid delivery system.
 15. Amethod comprising: receiving insertion of a fluid pump assembly intomultiple retractable loading guides of a fluid delivery system, themultiple retractable loading guides retaining and aligning the fluidpump assembly; receiving an input force to contact the fluid pumpassembly to a pump control interface disposed in a cavity of the fluiddelivery system, the pump control interface operable to control deliveryof fluid though the fluid pump assembly; and in response to receivingthe input force, moving the multiple retractable loading guides tomatably contact the fluid pump assembly to the pump control interface inthe cavity.
 16. The method as in claim 15, wherein receiving insertionof the fluid pump assembly includes: receiving tabs of the fluid pumpassembly in corresponding channels of the loading guides, thecorresponding channels of the multiple retractable loading guidesaligning the fluid pump assembly for insertion into the cavity.
 17. Themethod as in claim 15 further comprising: receiving the input forcethrough a lever resource in communication with the multiple retractableloading guides.
 18. The method as in claim 17 further comprising:conveying the input force from the lever resource to the multipleretractable loading guides through at least one spring resource tocontrol movement of the fluid pump assembly into the cavity.
 19. Themethod as in claim 15 further comprising: slidably retracting theloading guides in unison to support orthogonal insertion of thedisposable fluid pump assembly into the cavity.
 20. The method furthercomprising: guiding the fluid pump assembly into the loading guides vialedges disposed in a vicinity of the cavity of the fluid deliverysystem.
 21. The method as in claim 1, wherein the cavity includes ledgeson which to guide tabs of the fluid pump assembly into respectivechannels of the multiple retractable loading guides, the tabs disposedon edges of the fluid pump assembly.
 22. The method as in claim 1,wherein movement of the multiple retractable loading guides isorthogonal with respect to a facing of the fluid delivery system
 23. Themethod as in claim 1 further comprising: receiving the insertion of thefluid pump assembly into the loading guides via movement of the fluidpump assembly in a first direction; and moving the multiple retractableloading guides in a second direction orthogonal to the first directionto matably contact the fluid pump assembly to the pump control interfacein the cavity.
 24. The method as in claim 1, wherein the multipleretractable loading guides temporarily retain the disposable fluid pumpassembly at a position external to the cavity prior to insertion of thedisposable fluid pump assembly into the cavity.